Estco Enterprises offers circular connectors in signal, push-pull, and power configurations. Signal connectors have amp ratings ranging from 8 to 20, voltages ranging from 150 to 400, temperatures ranging from -40 to 257°F, and wire gauges ranging from 28 to 12 AWG. Push-pull connectors have a panel mounted/dual function, locking grooves, and can be easily connected/disconnected even under restricted working conditions. M23 Power connectors have contacts ranging from 2 to 6, amp ratings ranging from 8 to 28, voltages from 300 to 800, and wire gauge ranges from 24 to 12 AWG.

AMETEK HCC Industries offers circular connectors for the aerospace and defense industries. Rugged Gigabit Ethernet circular connectors are available in MIL-C-24321 and D389999 configurations. They are ETL certified to CAT 6 and TIA/EIA 568 CAT 5E. HSC Series MIL-C-19572 connectors have contact sizes ranging from 16 to 20, Amps ranging from 7.5 to 17, a maximum drop potential of 0.020 V, and up to 675 pressures equivalent to 50,000 ft.

MS Electronix, Inc. offers commercial circular connectors in a variety of sizes and configurations. DM-Deutsch connectors have P-pin, and S-socket contact styles. These connectors have contacts ranging from 3 to 25, insert arrangements ranging from 3 to 61, and the following polarizations: N, W, X, Y, B, and C.

Connectronics offers specialized circular interconnectors for a variety of applications, including nuclear, X-ray/laser equipment, hermetically sealed interconnects, thermocouple, space environment, and nuclear. These connectors have high currents to 1000 Amperes, high temperatures to +250°C, and high and/or low voltage options. X-Ray and Laser Equipment interconnectors can operate up to 100,000 volts, and come in coaxial and triaxal designs available for laser applications.